RSTDISBL reset disabled.

Using Arduino Project Guidance
1

Hi,
I am thinking of disabling reset of my atmega328 by burning bootloader so that it may not reset again.But, How could I upload sketch to the chip after RSTDISBL.? If the chip don't have sketch, what's the point of disabling reset? Pls. advise. Thanks.

2

The usual reason to disable the reset pin is so you can then use the pin as an extra digital input output. This makes more sense on a chip like the tiny85 that only has 8 pins total and two are used for power/gnd. So disabling reset then gives you 6 usable i/o pins instead of 5.

Once the pin is configured as an i/o pin instead of reset you will no longer be able to program it unless it is converted back to a reset pin using a high voltage programmer.

3

Then the chip has no program to run?What's the point? Pls. advise.Thanks.

4

Hi,
Is it that I can upload sketch with high voltage programming while maintaining reset disabled ? Pls. advise.Tq

5

Hi,
I want my atmega328 to be reset disabled RSTDISBL bit=0, and the chip running with sketches code. How could I do this? Pls. advise.Thanks.

6

yaptimmy:
Then the chip has no program to run?What's the point? Pls. advise.Thanks.

You put the code into the chip first, then you disable the interrupt pin.

To change the code you then use an external programmer to re-enable the interrupt pin, then you can put code into it.

7

Grumpy_Mike:
You put the code into the chip first, then you disable the interrupt pin.

To change the code you then use an external programmer to re-enable the interrupt pin, then you can put code into it.

Thanks. Do suggest a programmer to me, please!

8

How about this one:-

9

(deleted)

10

Will need a High Voltage (12V on Reset pin) programmer to undo it, be sure you're done making changes before changing it.

11

Can I use the method as the link below to first upload sketch, then disable reset bit with burn bootloder. I wonder if it could. Pls. advise. Tq.https://www.arduino.cc/en/Tutorial/ArduinoToBreadboard

12

Yes but you can not undo the disabling of the reset bit.

How many posts are you doing about the same question. That is called cross posting here, mainly because it makes us cross. This is at least the third thread on the same topic today.

13

@yaptimmy, do not cross-post. Threads merged.